I'm one of those who's opinion is that they're the same mutation. I see this as the whole lesser VS butter issue or the Phantom VS Mystic issue all over again. It used to be for a time that butters were more expensive than lessers so naturally those who had butters were the ones claiming that they were a completely different mutation. From my viewpoint, that looks to be the same thing that is happening to the calico VS sugar debate with sugars currently being the more desirable of the two. Remember that the normal you breed it to is just as important as the morph itself. When I breed my lesser to certain normal females, they look like classic lessers. When I breed him to other normal females the offspring look like classic butters. I suspect that the same thing will happen with the calico vs sugar question.